Lenses and range

Discussion in 'Photography Beginners' Forum' started by docphotog, Apr 24, 2009.

  1. docphotog

    docphotog TPF Noob!

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    Hey everyone, I was wondering how one can figure out the effective range of a lens. For example for canon's 17-85 mm, I was told that it has an equivalent range of 27-136 mm- how do you get that and why is that so?

    I was also wondering how the value in mm equates to actual distance that lens can shoot in either feet, yards w/e. The more I think about it, the more it seems like picking a lens for a particular photo is like picking the right club for a golf shot!!
     
  2. AlexColeman

    AlexColeman TPF Noob!

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    Equivalent: View on a 35mm camera

    What you are talking about is focusing distance.
     
  3. docphotog

    docphotog TPF Noob!

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  4. Ptyler22

    Ptyler22 TPF Noob!

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    There is one of those ^ on the Tamron site as well, but it's interactive and you can zoom in and out
     

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